Inside one of Mastronardi Produce Sunset Grown's greenhouses, tomato vines hang on lines that can be adjusted so that the tomatoes are always at a height that's convenient for harvesting. Dan Charles/NPR hide caption
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Russ Finch holds up half of a Cara Cara orange grown in his geothermal greenhouse in Alliance, Neb. Courtesy of Grant Gerlock/Harvest Public Media hide caption
Citrus In The Snow: Geothermal Greenhouses Grow Local Produce In Winter
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Paul Lightfoot, CEO of BrightFarms, in his company's greenhouse in Lower Makefield Township, Pa. Dan Charles/NPR hide caption
Vegetables Under Glass: Greenhouses Could Bring Us Better Winter Produce
Hydroponic tomatoes are now just as tasty as tomatoes grown outside in perfect summer conditions, scientists say. iStockphoto hide caption
This "pinkhouse" at Caliber Biotherapeutics in Bryan, Texas, grows 2.2 million plants under the glow of blue and red LEDs. Courtesy of Caliber Therapeutics hide caption
The taste of Mock's tomatoes starts with the seed. He uses only organic varieties, including cherry and several heirloom varieties. Allison Aubrey/NPR hide caption